Then on Sept. 1, Mayer and Perry were seen kissing and holding hands at the FYF music festival in Los Angeles. But now just a month later, the pair are seemingly off again.

“John just can’t commit, and he kept luring Katy back with promises that was going to change, but then he didn’t. Katy was pretty crazy about him, so she kept giving him another chance,” a source tells RadarOnline.

“John liked Katy, so he wanted to keep her in his life, but it just wasn’t up to Katy’s standards. She needs the guy to be on board 100 percent and she was sick of John disappearing for five days at a time, then booty calling her, then straightening up and treating her well, only to go back to his old behavior a few days later,” the source continues. “Finally she was like ‘lose my number.'”